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fixed acciedental critical path in FPU

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Katherine Parry 2022-06-14 00:02:38 +00:00
parent 7c0f4dd954
commit 674c31ce59
2 changed files with 4 additions and 10 deletions
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12
pipelined/src/fpu/fpu.sv
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@ -52,12 +52,6 @@ module fpu (
output logic [4:0] SetFflagsM // FPU flags (to privileged unit) output logic [4:0] SetFflagsM // FPU flags (to privileged unit)
); );
//*** make everything FLEN at some point
//*** add the 128 bit support to the if statement when needed
//*** make new tests for fp using testfloat that include flag checking and all rounding modes
//*** what is the format for 16-bit - finding conflicting info online can't find anything specified in spec
//*** only fma/mul and fp <-> int convert flags have been tested. test the others.
// FPU specifics: // FPU specifics:
// - uses NaN-blocking format // - uses NaN-blocking format
// - if there are any unsused bits the most significant bits are filled with 1s // - if there are any unsused bits the most significant bits are filled with 1s
@ -203,9 +197,9 @@ module fpu (
.FStallD, .FForwardXE, .FForwardYE, .FForwardZE); .FStallD, .FForwardXE, .FForwardYE, .FForwardZE);
// forwarding muxs // forwarding muxs
mux3 #(`FLEN) fxemux (FRD1E, FPUResultW, FpResM, FForwardXE, FSrcXE); mux3 #(`FLEN) fxemux (FRD1E, FPUResultW, PreFpResM, FForwardXE, FSrcXE);
mux3 #(`FLEN) fyemux (FRD2E, FPUResultW, FpResM, FForwardYE, FPreSrcYE); mux3 #(`FLEN) fyemux (FRD2E, FPUResultW, PreFpResM, FForwardYE, FPreSrcYE);
mux3 #(`FLEN) fzemux (FRD3E, FPUResultW, FpResM, FForwardZE, FPreSrcZE); mux3 #(`FLEN) fzemux (FRD3E, FPUResultW, PreFpResM, FForwardZE, FPreSrcZE);
generate generate

2
synthDC/scripts/synth.tcl
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@ -332,7 +332,7 @@ redirect -append $filename { report_timing -capacitance -transition_time -nets -
redirect -append $filename { echo "\n\n\n//// Critical paths through fma1 ////\n\n\n" } redirect -append $filename { echo "\n\n\n//// Critical paths through fma1 ////\n\n\n" }
redirect -append $filename { report_timing -capacitance -transition_time -nets -through {fma/fma1/*} -nworst 1 } redirect -append $filename { report_timing -capacitance -transition_time -nets -through {fma/fma1/*} -nworst 1 }
redirect -append $filename { echo "\n\n\n//// Critical paths through fma2 ////\n\n\n" } redirect -append $filename { echo "\n\n\n//// Critical paths through fma2 ////\n\n\n" }
redirect -append $filename { report_timing -capacitance -transition_time -nets -through {fma/fma2/*} -nworst 1 } redirect -append $filename { report_timing -capacitance -transition_time -nets -through {postprocess/*} -nworst 1 }
redirect -append $filename { echo "\n\n\n//// Critical paths through fpdiv ////\n\n\n" } redirect -append $filename { echo "\n\n\n//// Critical paths through fpdiv ////\n\n\n" }
redirect -append $filename { report_timing -capacitance -transition_time -nets -through {fdivsqrt/*} -nworst 1 } redirect -append $filename { report_timing -capacitance -transition_time -nets -through {fdivsqrt/*} -nworst 1 }
redirect -append $filename { echo "\n\n\n//// Critical paths through fcvt ////\n\n\n" } redirect -append $filename { echo "\n\n\n//// Critical paths through fcvt ////\n\n\n" }